Process for the manufacture of colloidal substances in the form of small balls or grains



' 30 manufacture.

Patented May 11,1926.

NITEi) STATES MANY, ASSIGNORS T AKrInNGEsnLLsc MALS H. scnnrnn urNnEL, or IBERLIN, GERMANY.

rnocnss Fen ran MA UFACTURE or coLLoiiiAL SU sMAnIf ALn-s on GRAINS.

Ne Drawing. Original applica This-application which 'is a divisinnval application from Serial Number 699,12, filed March 13, 1924 relates to a'process for pro- (lucingcolloidal substan small balls orgrains. a A

When a hotsolution of a colloidal s'ulc- PATENT OFFICE.

ALBERTOBERSdHN, or nrinLIN-oHARLorTENB RG, WILHELM wncn'rnn or BERLIN,

DANIEL SAKOM, or WIESBADEN, AND PAUL AsKnNAsY, or KARLSRUHE, ennccs'rin the form of.

stance, such as glue, gelatine "'r-the like,

is passed through a cooling ba composed of a'liquid which does not mix w th the colloid, the resulting drops of the collo1d form into small 'balls' or grains Which-are r'apid-- form and is more readily melted. In -the" following specification, the terms glue or solutions of glue are to be understood to 1nelude all colloidal substances" having the properties of glue which it is or may be con sidered desirable to produce "in granular It has been proposed to employ cooling agents which are non-miscible with or 01- vent of the glue solution. Such agents are usually expensive, and sometimes noxious, and must be removed by afurther step in the operation, thus increasing the cost of According to this invention, these dis advantages may be avoided by employlng.

tion filed Marcli 13, 1924, Serial No. 699,127. Divided 1 filed January L2, 19%?52 Serial No. 1,085.

The grains so produced maythen,

the drops into a h uid normally. sol'v v removing the solidified dropstherefrom be- 65 W .from colloids derived from bone and hide fluids which do not so favorably assist.

the action'of the formation of the grains,

L as for instance water, aqueous solutions 01 salts, aqueous emulsions, and the, like, provided the colloidal substance is introduced into the" fluid in question in the form -of drops. Such fluids have the merit that 40 they are cheaper and do not have 'anydeleterious action even if they do "adhere to )H some extent to the grains.

'In carrying the invention into vessel containing such an aqueous fluld, solu- HAFT run CHEMISCH E rnontrx'rn VOR- and this application tiori -or emulsion, cooled to approximately 1 centigrade, may have the glue solution led therethrouglr in the form of drops. This glue solution may comer'directly fro'm'the glue separating plant as temperature or about centigrade. he drops sink slowly through the solution, and are 'chilled faster than solutidn may occur, so that they deposit at thebottoin as solid grains, and may be removed therefrom for drying in any suitable manner". i What we claim is; i

, -1. The process -for producing colloidal substances of the class described in granular form consisting in preparing the substance in the form of hot concentrated solu-' 'tion miscible w'ith' Water, splitting the solution into the "form of drops, and passing ighly; cooled aqueous liq-' ent' of said "substance and fore any substantial solvent action occurs.

2. The process-for preparing glue in the form'of pearls consisting in preparingfthe material in the form of a hot concentrated solution miscible with Water, splitting the solution into thefor'm of drops, and passing the drops into water cooled to about one degree C.

3.'The process for producing, granules substances which consists in preparing the substance in the form of a hot concentrated solution in water, splitting the solution in-' to the form of'drops, and passing the drops into'a highly cooled aqueous liquid which 80 at normal temperatures is solvent of saidsubstance.

In testimony whereof We have signed our names to this specification.

ALBERT ,OBERSOHN, WILHELM WACHTEL. DANIEL SAKOM.

PAUL ASKENASY. 

